The function f is defined by the power series (-1)" 2n f(x) = Σ = 1 n=0 (2n+1)! 1+1-21 + (-1)" 2n (2n+1)! for all real numbers x. Use the first and second derivative test by finding f'(x) and f'(x). Determine whether f has a local maximum, a local minimum, or neither at x=0.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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The function f is defined by the power series
(-1)" x²n
f(x) = Σ n=0 (2n+1)!
for all real numbers x.
Use the first and second derivative test by finding f'(x) and f"(x). Determine whether f has a local maximum, a local minimum, or neither at x=0.
x4
1+1-1
5!
= 1 −²+
3!
7!
+. +
(-1)"x²n
(2n+1)!
Transcribed Image Text:The function f is defined by the power series (-1)" x²n f(x) = Σ n=0 (2n+1)! for all real numbers x. Use the first and second derivative test by finding f'(x) and f"(x). Determine whether f has a local maximum, a local minimum, or neither at x=0. x4 1+1-1 5! = 1 −²+ 3! 7! +. + (-1)"x²n (2n+1)!
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